High-Performance Reactive Fluid Flow Simulations Using Adaptive Mesh Refinement on Thousands of Processors

摘要: We present simulations and performance results of nuclear burning fronts in supernovae on the largest domain at finest spatial resolution studied to date. These were performed Intel ASCI-Red machine Sandia National Laboratories using FLASH, a code developed Center for Astrophysical Thermonuclear Flashes University Chicago. FLASH is modular, adaptive mesh, parallel simulation capable handling compressible, reactive fluid flows astrophysical environments. written primarily Fortran 90, uses Message-Passing Interface library inter-processor communication portability, employs PARAMESH package manage block-structured mesh that places blocks only where required tracks rapidly changing flow features, such as detonation fronts, with ease. describe key algorithms their implementation well optimizations achieve sustained 238 GFLOPS 6420 processors 64 bit arithmetic.